code: def register_client(client_type: Type[Client]):
      _scheme_to_client_types[client_type.scheme] = client_type
      return client_type
  
file_path: mars/mars/oscar/backends/communication/core.py
imports: from typing import Dict, Type
  from urllib.parse import urlparse
  from .base import Client, Server
label_desc: Use image node_id 1 for calling a global function with example usage: register_client(client_type) and returns: client_type